Improvement in driers



C. E. ASHCROFT.

Wool Drier.

Patented: Feb. 9, I869.

No." 86,625. v

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CHARLES E. ASHCROFT, OF BOSTON, MASSACHUSETTS. Letters Patent No.86,625, dated February 9,1869.

IMPROYEMENT IN DRIERS.

The Schedule referred to in these Letters Patent and making part o t thesame.

To all whom it may concern:

of this specification, in which like parts are indicated by like lettersin the several figures. V

The nature of my invention consists .in a certain combination andarrangement of parts, to be hereafter shown and described, whereby arapid and thorough circulation of heated air is caused throughout the entire body of the material undergoing the drying-process.

To enable others skilled in the art to makeand use my invention, I willproceed to describe its construction and operation. a

In the drawings- Figure 1 represents a perspective view of my apparatus;

Figure 2, a vertical section; and

Figure 3, a plan of the same.

to denotes an apartment, or suitable structure, of desirable size,material, and form, closed on each side, and at the bottom, ifnecessary.

This structure is dividechinto two parts by a perforated partition, 12,forming an upper and alower chamber. In the upper one,'the material tobe dried is placed, on and above the floor b.

Below this floor, I arrange a series of horizontal pipes, orsteam-conduits, or receivers, 0, extending from side to side ofithislower apartment.

These conduits are formed with upright branches (1 d, which terminatea'short distance below the. floor.

One or more of these upright branches I extend up through the floor,terminating with an elbow or elbows, as seen at f'f, in order to conductthe current of hot air toward and through the middle or mass of the ma-Within the outer pipes c, I arrange inner ones, 6, of

space between them. v

The inner pipes e are open at the ends, and are used as air-ducts.

chambers, and are to be closed at the ends, so as to cut ofi'communication between the inner and outer pipes e and c.

Steam of any desired temperature is supplied by usual means to the spacebetween the pipes, whilst air is supplied .or forced through the pipes ointo the lower chamber, thus deriving heat from both'pipes.

or other material, carrying off its moisture.

The steam circulating radiating-surface.

The inner pipe may be used for steam, and the annular space for thepassage of air. V

The shape of the pipes may vary, and their number be multiplied, so asto get as much radiating-surface as necessary. I am awareof the patentof John Petrie, April 1, 1862, reissued November 17, 1863. This I do notclaim. Having thus explained my invention, 1

ters Patent of the United States, is-- The arrangement of the combinedsteam-conduits c and air-ducts e, one or more of which may have alateral inward bend, f, branches, d, and perforated plate, I), allconstructed and operatedsubstantially as set forth.

0. E. ASHGROFT.

Witnesses FRED. OURTIS, Enwn. GRIFFITH.

smaller diameter, (concentrically,-) leaving an annular The spacesbetweenthe pipes are to be used as stcam- The heated air ascends, or isdriven upthrough -the I perforated floor, and permeates the mass ofpeat-wool,

between the pipes, ofi'course is the source of heat, and using twopipes, I get-more What I claim 'as new, and desire to secure by Let-

